<script setup>
import { ref } from 'vue'
import { ElMessage } from 'element-plus'

//控制注册与登录表单的显示， 默认显示注册
const isRegister = ref(false)

//定义注册绑定属性  想访问响应式对象必须要加 .value 来访问
const registerData = ref({
    username : "",
    password:"",
    rePassword:""

})
//定义校验密码函数,直接定义要写在校验规则前
const checkRePassword = (rule,value,callback)=>{
    if(value === ''){
        callback(new Error("请确认密码"))
    }else if(value !== registerData.value.password){
        callback(new Error("两次密码不相同"))
    }else{
        callback()
    }
}

//定义前端的校验规则
const rules = {
    username : [
        {required: true, message: "请输入用户名",trigger: 'blur'},
        {min: 4,max: 16,message: "长度为4~16的非空字符串",trigger: 'blur'}
    ],
    password:[
        {required: true, message: "请输入密码",trigger: 'blur'},
        {min: 5,max: 16,message: "长度为5~16的非空字符串",trigger: 'blur'}
    ],
    rePassword:[
        {validator: checkRePassword,trigger:'blur'}
    ]
}

import { registerService,loginService } from '@/api/user.js'


//登录
// 绑定登录数据，复用注册的数据，使用路由跳转页面
import { useRouter } from 'vue-router'

//导入pinia
import { useTokenStore } from '@/stores/token.js'
const tokenStore = useTokenStore();

const router = useRouter()
//复用注册的数据校验
//绑定的登录函数
const login = async ()=>{
    let result = await loginService(registerData.value)
    //把令牌保存到pinia里
    tokenStore.setToken( result.data)

    ElMessage.success(result.message? result.message : '登录成功!')
    //登陆成功，使用路由跳转页面
    router.push('/')

}

//用于注册的事件函数
const register = async () => {
    //console.log('注册...');
    let result = await registerService(registerData.value);
    ElMessage.success(result.message? result.message : '注册成功!')
    isRegister.value = false
    
}
//因为复用了数据模型，每次操作都要清空数据

const clearRegisterData = () =>{
    registerData.value = {
        username : "",
        password:"",
        rePassword:""
    }

}

</script>

<template>
    <el-row class="login-page">
        <el-col :span="12" class="bg"></el-col>
        <el-col :span="6" :offset="3" class="form">
            <!-- 注册表单  使用:model的作用仅仅是将父组件的数据loginForm传递给子组件，并没有实现子组件和父组件数据的双向绑定。 -->
            <el-form ref="form" size="large" autocomplete="off" v-if="isRegister" :model="registerData" :rules="rules">
                <el-form-item>
                    <h1>注册</h1>
                </el-form-item>
                <el-form-item prop = "username">
                    <el-input :prefix-icon="User" placeholder="请输入用户名" v-model="registerData.username"></el-input>
                </el-form-item>
                <el-form-item prop = "password">
                    <el-input :prefix-icon="Lock" type="password" placeholder="请输入密码" v-model="registerData.password"></el-input>
                </el-form-item>
                <el-form-item prop = "rePassword">
                    <el-input :prefix-icon="Lock" type="password" placeholder="请输入再次密码" v-model="registerData.rePassword"></el-input>
                </el-form-item>
                <!-- 注册按钮 -->
                <el-form-item>
                    <el-button class="button" type="primary" auto-insert-space v-on:click="register">
                        注册
                    </el-button>
                </el-form-item>
                <el-form-item class="flex">
                    <el-link type="info" :underline="false" @click="isRegister = false;clearRegisterData()">
                        ← 返回
                    </el-link>
                </el-form-item>
            </el-form>
            <!-- 登录表单 -->
            <el-form ref="form" size="large" autocomplete="off" v-else :model="registerData" :rules="rules">
                <el-form-item>
                    <h1>登录</h1>
                </el-form-item>
                <el-form-item prop="username">
                    <el-input :prefix-icon="User" placeholder="请输入用户名" v-model="registerData.username"></el-input>
                </el-form-item>
                <el-form-item  prop="password">
                    <el-input name="password" :prefix-icon="Lock" type="password" placeholder="请输入密码" v-model="registerData.password"></el-input>
                </el-form-item>
                <el-form-item class="flex">
                    <div class="flex">
                        <el-checkbox>记住我</el-checkbox>
                    </div>
                </el-form-item>
                <!-- 登录按钮 -->
                <el-form-item>
                    <el-button class="button" type="primary" auto-insert-space @click="login">登录</el-button>
                </el-form-item>
                <el-form-item class="flex">
                    <el-link type="info" :underline="false" @click="isRegister = true;clearRegisterData()">
                        注册 →
                    </el-link>
                </el-form-item>
            </el-form>
        </el-col>
    </el-row>
</template>

<style lang="scss" scoped>
/* 样式 */
.login-page {
    height: 100vh;
    background-color: #fff;

    .bg {
        background: 
           url('@/assets/logo2.png') no-repeat 60% center / 240px auto,
            url('@/assets/login_bg.jpg') no-repeat center / cover;
        border-radius: 0 20px 20px 0;
    }

    .form {
        display: flex;
        flex-direction: column;
        justify-content: center;
        user-select: none;

        .title {
            margin: 0 auto;
        }

        .button {
            width: 100%;
        }

        .flex {
            width: 100%;
            display: flex;
            justify-content: space-between;
        }
    }
}
</style>